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Stockholders' Equity - Summarizes Restricted Stock Unit (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
RSUs outstanding, beginning balance |  | 187,000
RSUs granted |  |
RSUs released |  | (173,000)
RSUs cancelled |  | (14,000)
RSU's outstanding, ending balance |  |
Balance exercisable |  |
Weighted average fair value per share beginning balance |  | $ 0.14
Weighted average fair value per share ending balance |  |

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- Definition RSU weighted average fair value per share + References No definition available. + Details
Name: | NTN_RSUWeightedAverageFairValuePerShare
Namespace Prefix: | NTN_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition RSUs cancelled + References No definition available. + Details
Name: | NTN_RestrictedStockUnitsCancelled
Namespace Prefix: | NTN_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Restricted stock units exercisable + References No definition available. + Details
Name: | NTN_RestrictedStockUnitsExercisable
Namespace Prefix: | NTN_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition RSUs released + References No definition available. + Details
Name: | NTN_RestrictedStockUnitsReleased
Namespace Prefix: | NTN_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |